Crashes in 9.0.22

[danhopgood]

I've been modifying existing models for X-Plane in 9.0.22 extensively with no problems.

Today I tried to create a new model from scratch using the "flange" video tutorial, but AC3D crashes every time if I do the replicate function after I create the outer disks. When I follow the video, at the point where I create a 2d mesh, AC3D crashes each and every time. If I do the replicate function first, as the video, it doesn't crash. Surely it shouldn't crash AC3d doing it another order?

I've reset AC3D to default settings with no difference. I'm using standard, up to date video card drivers. Card is NVidia GeForce GTX 750 Ti. Log file attached together with the part finished flange.

Any advice on how I can avoid these crashes would be welcome please.